Tracking Weight on Ozempic, Wegovy or Mounjaro

Why does weight tracking matter on GLP-1 medication?

It shows whether the treatment is working and keeps your doctor informed. GLP-1 medications reduce appetite, so weight often falls steadily, but never in a perfectly straight line. A clear record lets you and your prescriber see the pattern instead of guessing from a single weigh-in.

Tracking also protects you from two opposite mistakes: panicking over a normal one-week stall, and ignoring a loss that is quicker than your care team expected. Both are easy to avoid when the numbers are in front of you.

This article is general information, not medical advice. Dosing, side effects and any change to your treatment are decisions for your doctor or pharmacist.

How much weight do people lose on Ozempic, Wegovy or Mounjaro?

In large trials, average loss was roughly 15% of body weight on semaglutide 2.4 mg after 68 weeks and roughly 21% on tirzepatide at the highest dose after 72 weeks. Individual results vary widely, and some people lose far less than the average.

For a person starting at 100 kg (220 lb), 15% is about 15 kg (33 lb) over a year and a half. Those averages hide a big spread, and the first months usually move fastest. Compare yourself with your own trend, not with a headline number.

What should you track besides the scale?

Weight is the core number, but a few extra notes make your trend easier to interpret. Keep them wherever you already write things down, such as a notes app or a diary.

• Injection day and any dose change your doctor makes, so you can match them to shifts in your trend.
• Appetite and nausea on a simple 1 to 5 scale.
• Protein, fluids and strength sessions, because they protect muscle and affect how you feel.
• Questions for your next appointment.

Your weight trend is the number that matters. A tracker like Weightnote, a subscription iPhone app with a free trial, plots every weigh-in and smooths the noise so the direction is obvious. It does not log medication, food or body measurements, so keep those notes elsewhere.

How often should you weigh in?

Once a day at the same time works well, and two to three times a week is the minimum that still gives a useful trend. More readings make the trend more accurate, and the trend is what you act on. See how often to weigh yourself for the reasoning.

Day-to-day swings of 0.5 to 1.5 kg are normal even when you are eating much less, because of water, salt and digestion. Weigh after waking and using the toilet, before eating or drinking, in similar clothes. Reduced appetite and lower fluid intake can make some mornings read lower than they really are, which is another reason to trust the trend.

Is a plateau normal on GLP-1 medication?

Yes. Most people see loss slow or pause after several months as the body adapts and the dose stabilises. A flat trend for two to three weeks is a plateau, while one flat reading is just noise.

• Check the weekly trend, not yesterday's number.
• Review protein, sleep and daily movement.
• Do not change your dose yourself. Raise it with your doctor.
• Remember that a stable weight can still be a good result. See how to handle a plateau.

Many people also notice a plateau right after a dose increase or a stomach bug, when water and food intake shift. Give it a few weeks before deciding that something has stopped working.

How do you protect muscle while losing weight?

In trials, lean mass made up roughly a quarter to two fifths of the weight lost, so muscle is worth protecting. Strength training two to three times a week and enough protein, as your doctor or dietitian advises, are the usual recommendations.

The scale cannot tell fat from muscle. If your loss is very fast, or you feel weak, tired or notice your strength dropping, talk to your doctor. A body composition scan can give more detail, and Weightnote does not measure it. See muscle vs fat on the scale.

What loss rate should you flag to your doctor?

Losing more than about 1 kg (2 lb) per week for several weeks in a row is worth mentioning, especially with persistent vomiting, dizziness or severe fatigue. A healthy pace for most adults is 0.5 to 1 kg per week; see a healthy rate of weight loss.

Bring your weight trend and your notes to appointments. Check your BMI as an extra reference, but remember that your doctor looks at the full picture.

What happens to your weight when you stop?

Studies show that many people regain a large part of the weight within a year after stopping, so a long-term plan matters. Keep weighing in. Early regain of 1 to 2 kg is easier to catch and discuss with your doctor than a regain of 10 kg. See how to maintain your weight.

Setting a goal together with your doctor gives the trend a destination. Weightnote shows your distance to goal and celebrates milestones along the way, which helps motivation during slow weeks.